Method showUpdatePrompt

chat/components/ShareModals.js:763–799

* Show prompt asking user if they want to view their local copy or fetch latest

(existingSession)

                    <h3 class="text-lg font-semibold text-foreground mb-2">Updates Available</h3>
                    <p class="text-sm text-muted-foreground mb-4">
                        The shared chat "<strong>${escapeHtml(existingSession.title)}</strong>" has been updated since you imported it.
                    </p>
                    <div class="flex flex-col gap-2">
                        <button id="fetch-latest-btn" class="w-full px-4 py-2 text-sm font-medium rounded-lg bg-primary text-primary-foreground hover:bg-primary/90 transition-colors">
                            Fetch Latest Version <span class="opacity-60 ml-1">(Enter)</span>
                        </button>
                        <button id="use-local-btn" class="w-full px-4 py-2 text-sm font-medium rounded-lg border border-border text-foreground hover:bg-muted transition-colors">
                            Use My Local Copy <span class="opacity-60 ml-1">(Esc)</span>
                        </button>
                    </div>
                </div>
            `;

            const handleKeydown = (e) => {
                if (e.key === 'Enter') { e.preventDefault(); finish(true); }
                else if (e.key === 'Escape') { e.preventDefault(); finish(false); }
            };

            const finish = (result) => {
                document.removeEventListener('keydown', handleKeydown);
                this.cleanup();
                resolve(result);
            };

            document.addEventListener('keydown', handleKeydown);
            modal.querySelector('#fetch-latest-btn').onclick = () => finish(true);
            modal.querySelector('#use-local-btn').onclick = () => finish(false);
            modal.onclick = (e) => { if (e.target === modal) finish(false); };
        });
    }

    /**
     * Show prompt when shared API key verification fails
     */
    showSharedKeyVerificationFailedPrompt({ error, stationId, isBanned, banReason }) {
        return new Promise((resolve) => {
            const modal = this.createModalContainer();

            const title = isBanned ? 'Shared Key From Banned Station' : 'Shared Key Verification Failed';
            const description = isBanned